i had the riva 901 for awhile it was an older 650 mah one and recently decided to get an se kit since i knew the newer rivas were 3.7v and 750 mah. my old riva charged in an hour maybe an hour n a half from being completely dead but my se seems to take hours to charge, i figure the extra 100mah would make it take a little bit longer but not this long, is this normal or maybe an output problem with the charger?